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Ontong Java Atoll or Luangiua (formerly Lord Howe Atoll, not to be confused with Lord Howe Island) [2] is an atoll in the Solomon Islands, and one of the largest atolls on earth. It is inhabited by a Polynesian community of about 2,400 people, who speak the Ontong Java language .
Saharan trade routes circa 1400, with the modern territory of Niger highlighted. Unlike Ghana, Mali was a Muslim kingdom since its foundation, and under it, the gold–salt trade continued. Other, less important trade goods were slaves, kola nuts from the south and slave beads and cowry shells from the north (for use
A bedrock mortar (BRM) is an anthropogenic circular depression in a rock outcrop or naturally occurring slab, used by people in the past for grinding of grain, acorns or other food products. [1] There are often a cluster of a considerable number of such holes in proximity indicating that people gathered in groups to conduct food grinding in ...
Another type of metate called a grinding slab may also be found among boulder or exposed bedrock outcroppings. The upper face of the stone is used for grinding materials, such as acorns , that results in the smoothing of the stone's face and the creation of pocked dimples.
A model of the subducting Farallon slab under North America. In geology, the slab is a significant constituent of subduction zones. [1] Subduction slabs drive plate tectonics by pulling along the lithosphere to which they attach in a process known as slab pull and by inducing currents in the mantle via slab suction. [2]
The similarities and differences between the Wandering Rocks and the Symplegades has been much debated by scholars, as have potential locations for them. (See also Geography of the Odyssey .) As Scylla and Charybdis have often been located in the Straits of Messina , this has led some (like E. V. Rieu ) to suggest the Wandering Rocks were ...
Silent trade, also called silent barter, dumb barter ("dumb" here used in its old meaning of "mute"), or depot trade, is a method by which traders who cannot speak each other's language can trade without talking. Group A would leave trade goods in a prominent position and signal, by gong, fire, or drum for example, that they had left goods.
Although seismic tomography was producing low-quality images [2] of the Earth's mantle in the 1980s, images published in a 1997 editorial article in the journal Science clearly showed a cool slab near the core-mantle boundary, [9] as did work completed in 2005 by Hutko et al., showing a seismic tomography image that may be cold, folded slab ...